초록 ▼

Ⅲ. 연구개발의 내용 및 범위
연구개발 범위로는 조립식 사축처리 장치 보완 및 Lab & Pilot-scale 시스템을 이용한 사축 분해율 평가를 실시하여 사축처리 부산물 활용방안 제시함과 동시에 환경개선제 종류별 사축 매몰지 악취제어효과 비교 평가한다. 그리고 악취를 저감하기 위한 이산화염소 가스 분무 장치 보완하여 설치 실험한다. 또한 혐기소화 시스템의 사축 처리효율 검증과 동시에 사축 분해 부산물 활용방안 제시하여 혐기소화 기법을 적용한 사축처리기술 개발하여 혐기소화 기법을 활용한 환경친화적 사축 안전처리 기술을 개발한다

Ⅲ. 연구개발의 내용 및 범위
연구개발 범위로는 조립식 사축처리 장치 보완 및 Lab & Pilot-scale 시스템을 이용한 사축 분해율 평가를 실시하여 사축처리 부산물 활용방안 제시함과 동시에 환경개선제 종류별 사축 매몰지 악취제어효과 비교 평가한다. 그리고 악취를 저감하기 위한 이산화염소 가스 분무 장치 보완하여 설치 실험한다. 또한 혐기소화 시스템의 사축 처리효율 검증과 동시에 사축 분해 부산물 활용방안 제시하여 혐기소화 기법을 적용한 사축처리기술 개발하여 혐기소화 기법을 활용한 환경친화적 사축 안전처리 기술을 개발한다.

Abstract ▼

During the worst epidemic of foot-and-mouth disease (FMD) in South Korea, pathogenic microorganisms have not contaminated the leachate originated from carcass due to the installation of prefabricated tank. Hydrogen sulfide (140ppb) was detected but there were no significant differences observed betw

During the worst epidemic of foot-and-mouth disease (FMD) in South Korea, pathogenic microorganisms have not contaminated the leachate originated from carcass due to the installation of prefabricated tank. Hydrogen sulfide (140ppb) was detected but there were no significant differences observed between the entrance of the farm and the surroundings of the prefabricated tank. Although gas (154ppb) was produced inside the sealed burial site but it was unable to discharge outside. Due to the formation of gas, greenhouse gas was detected (232.2422ppm), which was higher than the gas produced (4.2929ppm) around the farm.
Following the worst epidemic of foot-and-mouth disease (FMD) in South Korea between 2010 and 2011, a three-year study started from 2011 was conducted to evaluate the feasibility of disposal system in burial site for emergency disposal of animal mortalities. During the study, 45 pig carcasses in 15 test units were disposed where each unit loaded with 3 pig carcasses. Temperature is one of the most important parameters affecting decomposition rate and odor emission process. Thus, temperatures inside each test unit were measured and found that the temperature of buried carcasses remains similar to underground temperatures ranges from 5 to 20⁰C. Due to low temperature, it retards carcass decomposition rate, which results in slow odorous compound generation and leachate production from burial site. The odor samples were collected and analyzed. The most identified odorous compounds emitted from decaying pig carcasses were sulfur compounds (H₂S, CH₃SH, DMS, DMDS), volatile fatty acids (VFAs), ammonia, aldehydes, and volatile organic compounds (VOCs) and the maximum amount of odor emission occurred in summer at the early stage with increased temperature. Differences of temperature may lead to change odor emission by affecting the activity of micro-organisms producing odorous compounds. Leachate originated from burial site also collected and analyzed. Despite of using quick lime according to the protocol, pH (7.1±0.1) of leachate was not higher as it was expected to be. In order to simulate decomposition of pig carcasses in real burial sites, lab-scale reactors were designed and scaled down to about 1/7^th were used. The average weight of pig (110kg) was loaded in each reactor, which then placed on top of the soil and quick lime layer and covered with same layers of soil and quick lime. Three replicated reactors were then placed in two constant temperature rooms set at 35 ⁰C and the simulated real burial site temperature i.e. 10-20⁰C. Gas samples were collected from the head space of each reactor using suction pump. Volatile sulfur compounds (VSCs) like H₂S, CH₃SH, DMS, and DMDS were detected from both constant temperature rooms.
The degradation process of soft tissues of pig carcass begins rapidly at 35⁰C, which accelerates to release maximum amount of VSCs from day 7-42. When the degradation process operated at 10-20⁰C, VSCs started emitting slowly and most of the emissions occurred from day 42 until day 189 because decreased temperature slower the activity of micro-organisms, which influenced to emit VSCs at a later stage. It has also been seen that the initial body weight was reduced approximately 17% and 44% after 6 months and 16 months, respectively. Influence of additives on odor reduction and carcass decomposition also observed. Results suggests that the emission concentrations of sulfur compounds such as CH₃SH and DMS were lower until day 30 than control when used additives (EM,BA). Although there were no big differences in odor emissions observed as a whole thereafter.

목차 Contents

• 표지 ... 1
• 제출문 ... 2
• 요약문 ... 3
• SUMMARY ... 5
• 목차 ... 7
• 제1장 서 론 ... 8
• 제2장 국내외 기술개발 현황 ... 8
• 제1절 국내 현황 ... 8
• 제2절 국외 연구 현황 ... 9
• 제3절 국내외 연구현황 비교 및 필요 연구분야 ... 10
• 제4절 국제공동연구를 통해서 해결 가능 분야 ... 11
• 제3장 연구개발수행 내용 및 결과 ... 13
• 제1절 사축처리장치 개발 ... 13
• 제2절 혐기소화기법을 적용한 사축 처리기술 개발 ... 19
• 제3절 살처분 매몰지역 악취제어기술 개발 ... 30
• 제4절 혐기소화기법을 이용한 환경친화적 사축 처리기술 개발 ... 35
• 제4장 연구개발목표 달성도 및 대외기여도 ... 40
• 제1절 목표대비 달성도 ... 40
• 제2절 정량적 성과 ... 40
• 제5장 연구개발결과의 활용계획 ... 41
• 제6장 참고문헌 ... 41